RPICT3V1
This page is for board specific information. More information can be found on the generic page for RPICT series.
- 3 AC current sensor
- 1 AC Voltage sensor.
- Compute real power.
- Fit on Raspberrypi 2 holes mounting pattern.
- Attiny84 Mcu
Recommended sensors
- AC Current sensor: SCT-013-000
- AC Voltage sensor:
- UK: 77DB-06-09
- EU: 77DE-06-09
- US: 77DA-10-09 or STA-4190D
Configuration
Starting from sketch version 1.1 the RPICT3V1 is configured over serial.
See general instructions for configuration below:
Configuration over serial for sketch version 1.1.
Configuration over serial for sketch version 1.2.
View the data with Python
Please note the uploaded sketch must have CSV enabled (format=0). The example script below will be a good starting point.
First of all make sure you have python-serial package installed
$ sudo apt-get install python-serial
Then copy the following into an executable file and run it.
#!/usr/bin/python
import serial
ser = serial.Serial('/dev/ttyAMA0', 38400)
try:
while 1:
response = ser.readline()
z = response.split(",")
if len(z)>=6:
print "RealP 1: %s Watts" % z[0]
print "RealP 2: %s Watts" % z[1]
print "RealP 3: %s Watts" % z[2]
print "Irms 1: %s mA" % z[3]
print "Irms 2: %s mA" % z[4]
print "Irms 3: %s mA" % z[5]
print "Vrms : %s Volts" % z[6][:-2]
except KeyboardInterrupt:
ser.close()
EmonCMS Output
Using the default sketch the output will be
NodeID Realpower1 Realpower2 Realpower3 Irms1 Irms2 Irms3 Vrms
- RealPower in Watts
- Irms in MilliAmps
- Vrms in Volts
Sketch
Version 1.0
Version 1.1
Version 1.2
If you wish to use the board as a RPICT3 without any use of the voltage use the sketch below. Note power will be estimated power only.
No Voltage Version 1.0